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Extracted text from sanyo dc mcr50 (Ocr-read)
Page 1
- 1 -
LASER BEAM SAFETY PRECAUTION
-Pick-up that emits a laser beam is used in this CD player section.
CAUTION :
USE OF CONTROLS OR ADJUSTMENTS
OR PERFORMANCE OF PROCEDURES
OTHER THAN THOSE SPECIFIED HEREIN
MAY RESULT IN HAZARDOUS RADIATION
EXPOSURE
LASER OUTPUT .......... 0.6 mW Max. (CW)
WAVELENGTH ............. 790 nm CAUTION -“ INVISIBLE LASER RADIATION WHEN OPEN AND
INTERLOCKS DEFEATED. AVOID EXPOSURE TO BEAM.
ADVARSEL -“ USYNLIG LASER STRĂ…LING VED Ă…BNING, NĂ…R
SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION, UNDGÅ UDS ÆTTELSE
FOR STRĂ…LING.
VARNING -“ OSYNLIG LASER STRĂ…LNING NĂ„R DENNA DEL Ă„R Ă–PPNAD
OCH SPĂ„RR Ă„R URKOPPLAD. STRĂ…LEN Ă„R FARLIG.
VORSICHT -“ UNSICHTBARE LASERSTRAHLUNG TRITT AUS, WENN
DECKEL GEĂ–FFNET UND WENN SICHERHEITSVERRIEGELUNG
ĂśBERBRĂśCKT IST. NICHT, DEM STRAHL AUSSETZEN.
VARO -“ AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALTTIINA
NĂ„KYMĂ„TTĂ–MĂ„LLE LASERSĂ„TEILYLLE. Ă„LĂ„ KA
TSO SĂ„TEESEEN.
IC BLOCK DIAGRAM & DESCRIPTION
IC101 LA1823 (FM/AM MIX.)
IC401 KIA7808 (Regulator)
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
AM
RFAM
MIX
AM
OSC
OSC
BUFFER
FM
MIXFM
OSC
IF
BUFFER
FM
IFAM
IF FM
S-METER
AM
DET PHASE
COMP MUTE V
CC2 GND2
REG V
CC1GND1AGC ST TRIG
ST SW
VCO DECODER
FF FFFF
SDPILOT
DETFM
DET
FM
RF
IC102 LC72131 (PLL)
1 2 3
Pin No. Function
1INPUT
2COMMON
3
OUTPUT
Page 2
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TUNER ADJUSTMENTS
Use a plastic screw driver for adjustments.
Adjust the intermediate frequency of AM and FM to the frequency of ceramic filter.
Supply voltage : DC 12.0V
Phones impedance : 32 ohms
Function switch : RADIO
a. Parts Location
b. AM Adjustment BAND SELECT SWITCH: AM.
Ste
p Adjusting Tuning Input Connection Output Connection Adjustment VTVM Oscilloscope
circuit Frequency Measurement InputMeasurement
Output Parts OR VT. VOLT.
IC101PIN19(H)
1 IF 999 kHz AM Sweep Loop ANT VTVM
IC101PIN6(E)T102
(450 KHz) GenertorOscilloscope
2Tuning 522 KHz
Digital C131(H), T101 1.50V+/- 0.05 V
3Coverage 1611 kHz Voltmeter C131(E)
Confirm 7.8V+/-0.8 V
4603 kHz AM Signal VTVM C146TU(L)L106
5Tracking 1404 kHz GeneratorLoop ANT
Oscilloscope
IC101 pin6(E) TC101Maximum
b. FM Adjustment BAND SELECT
SWITCH: FM. FM Dummy Antenna : 75 ohm unbalance
StepAdjusting Tuning Input Connection Output Connection Adjustment
VTVM Oscilloscope
circuit Frequency Measurement InputMeasurement
Output Parts
1 IF 98.0 MHz FM Sweep IC101(5)H VTVM IC101PIN19(H)
(10.70 MHz)
Genertor IC101(6) EOscilloscope IC101PIN6(E)
(Non-adjustment)
2Tuning 87.5 MHz
Digital C105(H) L103 2.0V+/- 0.2V
3Coverage
108 MHz Voltmeter C105(E)
490.0 MHz FM Signal C110 (H) VTVM C146TU(L)L102
5Tracking 106.0 MHzGenerator
IC101(6)EOscilloscope
IC101 pin6(E)
TC102
Confirm6,5V+/- 0.8V
Maximum
